The rich amine solvent from the contactor bottom flows to the Amine Flash Drum through level control valve. This level will let the rich amine pressure down from 46.3 to 5.5 barg. This is where the first stage of degassing of the solvent takes place. The drum is designed to allow the break out of the H2S and CO2. The drum is designed for liquid removal efficiency of 99% or greater for liquid droplet size of less then 70 micron, limiting the liquid carryover in the gas to be less than 0.1 gal.MMSCF, maximum oil carryover in the outlet water is 1% weight and maximum water carryover in the outlet oil is 1% weight.
Rich amine solution from the flash drum, at 31 degC flows into the lean/ rich amine exchangers and is heated to about 93.5 degC. Proir entering the exchanger; the rich amine is filtered at the rich filter to removed any contaminant particles.
The rich amine solution flows into the amine regenerator and de-pressurized from 5 to 0.55 barg by control valve. The pressure reduction releases some of the dissolved acid gas and some light hydrocarbon from the solution. the column is operated at about 0.55 barg to aid in releasing H2S from the solution.
The regenerator is a trayed column fitted with re-flux to optimize the stripping of the sour gases from the amine solution. a portion of the regenerator overhead system is condensed in the Amine regenerator cooler to produce the liquid required at temperature of 49 degC. This liquid and vapour are separated in the Amine Reflux Drum. The liquid is pumped by the amine reflux pumps back to regenerator.
Residual H2S in the flashed solution is stripped off in the tube side of the Amine Regenerator Reboilerwith heat input from hot oil on the shell side. The reboiler is a shell & tube vertical thermoshipon type exchanger.
No comments:
Post a Comment